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arXiv 2101.02071cond-mat.mes-hall
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正方形反点晶格中微波诱导的磁子带间散射

Microwave-Induced Magneto-Intersubband Scattering in a Square Lattice of Antidots

A. A. Bykov, I. S. Strygin, A. V. Goran, E. E. Rodyakina, D. V. Nomokonov, I. V. Marchishin, S. Abedi, S. A. Vitkalov

摘要:

研究了微波辐射对周期为d = 0.8 μ m的GaAs量子阱反点晶格中电子低温磁输运的影响。它示出,由于在子带中的电子密度之间的显着差异,在所调查的反点晶格中的电阻的可伸缩性振荡观察到仅为第一子带。结果表明,在回旋共振条件下,微波辐照导致在主磁化率峰区域的逆磁场中形成周期性的电阻振荡。它是建立这些振荡的周期对应于磁子带间振荡的周期。所观察到的效果是由子带E1和E2中的电子加热之间的差异所引起的子带间散射率的增加来解释的。

英文摘要:

The effect of microwave radiation on low-temperature electron magnetotransport in a square antidot lattice with a period of d = 0.8 micrometer based on a GaAs quantum well with two occupied energy subbands E1 and E2 is investigated. It is shown that, owing to a significant difference between the electron densities in the subbands, commensurability oscillations of the resistance in the investigated antidot lattice are observed only for the first subband. It is found that microwave irradiation under the cyclotron resonance condition results in the formation of resistance oscillations periodic in the inverse magnetic field in the region of the main commensurability peak. It is established that the period of these oscillations corresponds to the period of magneto-intersubband oscillations. The observed effect is explained by the increase in the rate of intersubband scattering caused by the difference between the electron heating in the subbands E1 and E2.

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